10211243022221 has 2 divisors, whose sum is σ = 10211243022222. Its totient is φ = 10211243022220.

The previous prime is 10211243022119. The next prime is 10211243022269. The reversal of 10211243022221 is 12222034211201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9578319352996 + 632923669225 = 3094886^2 + 795565^2 .

It is an emirp because it is prime and its reverse (12222034211201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10211243022221 - 2²² = 10211238827917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10211243012221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105621511110 + 5105621511111.

It is an arithmetic number, because the mean of its divisors is an integer number (5105621511111).

Almost surely, 2^{10211243022221} is an apocalyptic number.

It is an amenable number.

10211243022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211243022221 is an equidigital number, since it uses as much as digits as its factorization.

10211243022221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 10211243022221 its reverse (12222034211201), we get a palindrome (22433277233422).

The spelling of 10211243022221 in words is "ten trillion, two hundred eleven billion, two hundred forty-three million, twenty-two thousand, two hundred twenty-one".